diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
index 0d3fc2c5244e0..f0e4f5d8a8013 100644
--- a/library/proc_macro/src/lib.rs
+++ b/library/proc_macro/src/lib.rs
@@ -1493,7 +1493,7 @@ pub mod tracked_env {
     use std::ffi::OsStr;
 
     /// Retrieve an environment variable and add it to build dependency info.
-    /// Build system executing the compiler will know that the variable was accessed during
+    /// The build system executing the compiler will know that the variable was accessed during
     /// compilation, and will be able to rerun the build when the value of that variable changes.
     /// Besides the dependency tracking this function should be equivalent to `env::var` from the
     /// standard library, except that the argument must be UTF-8.